Here is some info:
Printing of other high-denomination bills was discontinued in 1946, but continued to circulate until 1969, when they were officially withdrawn. The $5,000 and $10,000 effectively disappeared well before then: there are only about 200 $5,000 and 300 $10,000 bills known, of all series since 1861. Most of the $10,000 bills are due to the preservation of 100 ($1,000,000) of them by Benny Binion, the owner of Binion's Horseshoe casino in Nevada. For many years, they were displayed in a glass case in the casino. The case is no longer there, and the bills were sold to collectors.
http://en.wikipedia.org/wiki/Large_denomination_bills_in_U.S._currency